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To measure very high pressure a pressure gauge used is -
1. Differential liquid pressuremeter
2. Bourden pressure gage
3. Simple manometer
4. Piezometer

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Correct Answer - Option 2 : Bourden pressure gage

Explanation:

Mechanical gauge:

(i) Mechanical gauges are those pressure measuring devices, which embody an elastic elemeant, which deflects under the action of the applied pressure P and this movement after being (mechanically magnified), operates a pointer moving against a graduated circumferential scale.

(ii) Generally, these gauges are used for measuring high pressure and where high precision is not required.

(iii) Following are the types of mechanical gauges:

  • Bourdon Tube Pressure Gauge
  • Diaphragm Pressure Gauge
  • Bellows Pressure Gauge
  • Dead-weight Pressure Gauge

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